Update uri mapping

To move away from ES query_string, new mapping for the uri fields
should be introduced.

For the index_analyzer we use the pattern_capture filter to be
able to split the uri field to our desire. Some stop words were
added to remove the common not relevant tokens.

In a separate issue the three uri field mapping should be cleaned up, and if a regexp ace can suggest simpler regular expressions I'd gladly use them.

Fix for #1243